diff --git a/doc/_icon/storage-dao.svg b/doc/_icon/storage-dao.svg
new file mode 100644
index 0000000..0edd994
--- /dev/null
+++ b/doc/_icon/storage-dao.svg
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\ No newline at end of file
diff --git a/doc/storage/storage.md b/doc/storage/storage.md
index b96af09..8fa2d46 100644
--- a/doc/storage/storage.md
+++ b/doc/storage/storage.md
@@ -6,6 +6,8 @@
 - jinja2
 - go mod
 
+#### storage 执行流程
+![](../_icon/storage-dao.svg)
 #### 分层，简介
 ```sh
 .